0
1

[–] theMETA 0 points 1 points (+1|-0) ago 

You would also need seperate rPi units per camera. That means you'll probably need seperate storage for each rPi unit... At least to boot each unit, and maybe to store your data.

Reversing the voltage from your vehicle's ignition wouldn't be difficult, you'll just need to regulate it down to ~5V. It's already DC, so there's no need for a rectifier, if you do things right.

[–] [deleted] 0 points 1 points (+1|-0) ago 

[Deleted]

0
0

[–] Erotic_Monkey [S] 0 points 0 points (+0|-0) ago 

Thanks Goat, I haven't had a chance to try it yet, but it is good that you think it should work in theory..

0
0

[–] Erotic_Monkey [S] 0 points 0 points (+0|-0) ago 

Good information about the power to the rPi, being DC already helps enormously. Do you know how it could work when booting from being 'off', can you set the rPi to boot and run X program for example or would it just boot and run whatever code you have installed onto it anyway?

You would also need seperate rPi units per camera.

Can you not record from two inputs to one rPi?

0
1

[–] theMETA 0 points 1 points (+1|-0) ago 

Oh yeah, you can autorun anything you want. For instance, I run all of in headless, so I have mine run a quick sketch that makes them email me their IP address, so I can SSH into them.

Can you not record from two inputs to one rPi?

The rPi is a digital device, with the only analog input being the ribbon-cable for the proprietary camera. This means you can only comment one camera to a Pi, at any given time.

0
1

[–] hairybawbag 0 points 1 points (+1|-0) ago 

I don't think it would be too difficult but you'd need to run cables from the centre of the car to front and rear windscreens which would be a PITA. Not sure how you'd connect it to the ignition system.

You can buy small cameras, 1 for front and 1 for rear that are charged instead of requiring a power cable and detect motion to power on/down for not that much these days.

For a hobby proj it could be fun so bash on :)

0
0

[–] Erotic_Monkey [S] 0 points 0 points (+0|-0) ago 

Good idea with the battery powered cameras, however, I would prefer them to be wired to eliminate the possibility of them not working due to no charge, when needed. I'm not too worried about running the wires as I am thinking it should only be x3, one for each camera and one to power the rPi.

0
0

[–] crankypants15 0 points 0 points (+0|-0) ago  (edited ago)

Why a dash cam? Is this for police issues? Because there have been police in many US states demanding people turn off their cell phone camera, and I think the Supreme Court ruled this is illegal. There seems to be more videos about this happening in Texas.

But consider this.

  • Convert your vehicle's 12vdc to 5vdc with your standard car USB charger.
  • You will need the camera option for the RPi. I don't know if any other camera works with it.
  • How blurry is the image while the car is moving and bumping around? Does the camera or software have image stabilization features?
  • You will need to find software which records video.
  • If your SD card gets close to full, will the software overwrite older video to add the new video, or do you have to delete the oldest video file manually?
  • Higher resolutions of video fill up the SD card faster. Which size SD card will you use? 32GB?
  • SD cards come in different speeds and for video you might need the high speed version, and I forget the name of it. Those are more expensive.
  • How will you keep the components from sliding around your dash? Suction cups on glass eventually stop working and they tend not to work at all in cold weather below 32F. (The Garmin suction cups for GPS units work great. I've used the same one for 4 years and it's fine. They would be great to buy if you can get them separately.)
  • Get prices for components at https://www.raspberrypi.org/products/.

Actual dashcams.